441 lines
11 KiB
C
441 lines
11 KiB
C
/*
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* tifm_7xx1.c - TI FlashMedia driver
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*
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* Copyright (C) 2006 Alex Dubov <oakad@yahoo.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/tifm.h>
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#include <linux/dma-mapping.h>
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#define DRIVER_NAME "tifm_7xx1"
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#define DRIVER_VERSION "0.6"
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static void tifm_7xx1_eject(struct tifm_adapter *fm, struct tifm_dev *sock)
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{
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int cnt;
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unsigned long flags;
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spin_lock_irqsave(&fm->lock, flags);
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if (!fm->inhibit_new_cards) {
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for (cnt = 0; cnt < fm->max_sockets; cnt++) {
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if (fm->sockets[cnt] == sock) {
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fm->remove_mask |= (1 << cnt);
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queue_work(fm->wq, &fm->media_remover);
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break;
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}
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}
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}
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spin_unlock_irqrestore(&fm->lock, flags);
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}
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static void tifm_7xx1_remove_media(struct work_struct *work)
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{
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struct tifm_adapter *fm =
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container_of(work, struct tifm_adapter, media_remover);
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unsigned long flags;
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int cnt;
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struct tifm_dev *sock;
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if (!class_device_get(&fm->cdev))
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return;
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spin_lock_irqsave(&fm->lock, flags);
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for (cnt = 0; cnt < fm->max_sockets; cnt++) {
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if (fm->sockets[cnt] && (fm->remove_mask & (1 << cnt))) {
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printk(KERN_INFO DRIVER_NAME
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": demand removing card from socket %d\n", cnt);
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sock = fm->sockets[cnt];
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fm->sockets[cnt] = NULL;
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fm->remove_mask &= ~(1 << cnt);
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writel(0x0e00, sock->addr + SOCK_CONTROL);
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writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
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fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
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writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
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fm->addr + FM_SET_INTERRUPT_ENABLE);
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spin_unlock_irqrestore(&fm->lock, flags);
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device_unregister(&sock->dev);
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spin_lock_irqsave(&fm->lock, flags);
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}
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}
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spin_unlock_irqrestore(&fm->lock, flags);
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class_device_put(&fm->cdev);
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}
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static irqreturn_t tifm_7xx1_isr(int irq, void *dev_id)
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{
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struct tifm_adapter *fm = dev_id;
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unsigned int irq_status;
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unsigned int sock_irq_status, cnt;
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spin_lock(&fm->lock);
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irq_status = readl(fm->addr + FM_INTERRUPT_STATUS);
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if (irq_status == 0 || irq_status == (~0)) {
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spin_unlock(&fm->lock);
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return IRQ_NONE;
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}
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if (irq_status & TIFM_IRQ_ENABLE) {
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writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
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for (cnt = 0; cnt < fm->max_sockets; cnt++) {
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sock_irq_status = (irq_status >> cnt) &
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(TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK);
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if (fm->sockets[cnt]) {
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if (sock_irq_status &&
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fm->sockets[cnt]->signal_irq)
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sock_irq_status = fm->sockets[cnt]->
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signal_irq(fm->sockets[cnt],
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sock_irq_status);
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if (irq_status & (1 << cnt))
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fm->remove_mask |= 1 << cnt;
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} else {
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if (irq_status & (1 << cnt))
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fm->insert_mask |= 1 << cnt;
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}
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}
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}
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writel(irq_status, fm->addr + FM_INTERRUPT_STATUS);
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if (!fm->inhibit_new_cards) {
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if (!fm->remove_mask && !fm->insert_mask) {
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writel(TIFM_IRQ_ENABLE,
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fm->addr + FM_SET_INTERRUPT_ENABLE);
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} else {
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queue_work(fm->wq, &fm->media_remover);
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queue_work(fm->wq, &fm->media_inserter);
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}
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}
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spin_unlock(&fm->lock);
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return IRQ_HANDLED;
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}
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static tifm_media_id tifm_7xx1_toggle_sock_power(char __iomem *sock_addr, int is_x2)
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{
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unsigned int s_state;
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int cnt;
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writel(0x0e00, sock_addr + SOCK_CONTROL);
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for (cnt = 0; cnt < 100; cnt++) {
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if (!(TIFM_SOCK_STATE_POWERED &
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readl(sock_addr + SOCK_PRESENT_STATE)))
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break;
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msleep(10);
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}
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s_state = readl(sock_addr + SOCK_PRESENT_STATE);
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if (!(TIFM_SOCK_STATE_OCCUPIED & s_state))
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return FM_NULL;
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if (is_x2) {
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writel((s_state & 7) | 0x0c00, sock_addr + SOCK_CONTROL);
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} else {
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// SmartMedia cards need extra 40 msec
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if (((readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7) == 1)
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msleep(40);
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writel(readl(sock_addr + SOCK_CONTROL) | TIFM_CTRL_LED,
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sock_addr + SOCK_CONTROL);
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msleep(10);
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writel((s_state & 0x7) | 0x0c00 | TIFM_CTRL_LED,
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sock_addr + SOCK_CONTROL);
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}
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for (cnt = 0; cnt < 100; cnt++) {
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if ((TIFM_SOCK_STATE_POWERED &
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readl(sock_addr + SOCK_PRESENT_STATE)))
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break;
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msleep(10);
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}
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if (!is_x2)
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writel(readl(sock_addr + SOCK_CONTROL) & (~TIFM_CTRL_LED),
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sock_addr + SOCK_CONTROL);
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return (readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7;
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}
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inline static char __iomem *
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tifm_7xx1_sock_addr(char __iomem *base_addr, unsigned int sock_num)
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{
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return base_addr + ((sock_num + 1) << 10);
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}
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static void tifm_7xx1_insert_media(struct work_struct *work)
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{
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struct tifm_adapter *fm =
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container_of(work, struct tifm_adapter, media_inserter);
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unsigned long flags;
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tifm_media_id media_id;
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char *card_name = "xx";
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int cnt, ok_to_register;
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unsigned int insert_mask;
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struct tifm_dev *new_sock = NULL;
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if (!class_device_get(&fm->cdev))
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return;
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spin_lock_irqsave(&fm->lock, flags);
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insert_mask = fm->insert_mask;
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fm->insert_mask = 0;
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if (fm->inhibit_new_cards) {
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spin_unlock_irqrestore(&fm->lock, flags);
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class_device_put(&fm->cdev);
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return;
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}
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spin_unlock_irqrestore(&fm->lock, flags);
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for (cnt = 0; cnt < fm->max_sockets; cnt++) {
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if (!(insert_mask & (1 << cnt)))
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continue;
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media_id = tifm_7xx1_toggle_sock_power(tifm_7xx1_sock_addr(fm->addr, cnt),
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fm->max_sockets == 2);
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if (media_id) {
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ok_to_register = 0;
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new_sock = tifm_alloc_device(fm, cnt);
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if (new_sock) {
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new_sock->addr = tifm_7xx1_sock_addr(fm->addr,
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cnt);
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new_sock->media_id = media_id;
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switch (media_id) {
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case 1:
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card_name = "xd";
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break;
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case 2:
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card_name = "ms";
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break;
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case 3:
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card_name = "sd";
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break;
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default:
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break;
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}
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snprintf(new_sock->dev.bus_id, BUS_ID_SIZE,
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"tifm_%s%u:%u", card_name, fm->id, cnt);
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printk(KERN_INFO DRIVER_NAME
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": %s card detected in socket %d\n",
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card_name, cnt);
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spin_lock_irqsave(&fm->lock, flags);
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if (!fm->sockets[cnt]) {
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fm->sockets[cnt] = new_sock;
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ok_to_register = 1;
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}
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spin_unlock_irqrestore(&fm->lock, flags);
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if (!ok_to_register ||
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device_register(&new_sock->dev)) {
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spin_lock_irqsave(&fm->lock, flags);
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fm->sockets[cnt] = NULL;
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spin_unlock_irqrestore(&fm->lock,
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flags);
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tifm_free_device(&new_sock->dev);
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}
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}
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}
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writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
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fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
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writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
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fm->addr + FM_SET_INTERRUPT_ENABLE);
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}
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writel(TIFM_IRQ_ENABLE, fm->addr + FM_SET_INTERRUPT_ENABLE);
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class_device_put(&fm->cdev);
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}
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static int tifm_7xx1_suspend(struct pci_dev *dev, pm_message_t state)
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{
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struct tifm_adapter *fm = pci_get_drvdata(dev);
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unsigned long flags;
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spin_lock_irqsave(&fm->lock, flags);
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fm->inhibit_new_cards = 1;
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fm->remove_mask = 0xf;
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fm->insert_mask = 0;
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writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
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spin_unlock_irqrestore(&fm->lock, flags);
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flush_workqueue(fm->wq);
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tifm_7xx1_remove_media(&fm->media_remover);
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pci_set_power_state(dev, PCI_D3hot);
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pci_disable_device(dev);
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pci_save_state(dev);
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return 0;
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}
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static int tifm_7xx1_resume(struct pci_dev *dev)
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{
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struct tifm_adapter *fm = pci_get_drvdata(dev);
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unsigned long flags;
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pci_restore_state(dev);
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pci_enable_device(dev);
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pci_set_power_state(dev, PCI_D0);
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pci_set_master(dev);
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spin_lock_irqsave(&fm->lock, flags);
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fm->inhibit_new_cards = 0;
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writel(TIFM_IRQ_SETALL, fm->addr + FM_INTERRUPT_STATUS);
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writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
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writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SETALLSOCK,
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fm->addr + FM_SET_INTERRUPT_ENABLE);
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fm->insert_mask = 0xf;
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spin_unlock_irqrestore(&fm->lock, flags);
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return 0;
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}
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static int tifm_7xx1_probe(struct pci_dev *dev,
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const struct pci_device_id *dev_id)
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{
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struct tifm_adapter *fm;
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int pci_dev_busy = 0;
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int rc;
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rc = pci_set_dma_mask(dev, DMA_32BIT_MASK);
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if (rc)
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return rc;
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rc = pci_enable_device(dev);
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if (rc)
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return rc;
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pci_set_master(dev);
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rc = pci_request_regions(dev, DRIVER_NAME);
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if (rc) {
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pci_dev_busy = 1;
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goto err_out;
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}
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pci_intx(dev, 1);
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fm = tifm_alloc_adapter();
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if (!fm) {
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rc = -ENOMEM;
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goto err_out_int;
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}
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fm->dev = &dev->dev;
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fm->max_sockets = (dev->device == 0x803B) ? 2 : 4;
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fm->sockets = kzalloc(sizeof(struct tifm_dev*) * fm->max_sockets,
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GFP_KERNEL);
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if (!fm->sockets)
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goto err_out_free;
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INIT_WORK(&fm->media_inserter, tifm_7xx1_insert_media);
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INIT_WORK(&fm->media_remover, tifm_7xx1_remove_media);
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fm->eject = tifm_7xx1_eject;
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pci_set_drvdata(dev, fm);
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fm->addr = ioremap(pci_resource_start(dev, 0),
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pci_resource_len(dev, 0));
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if (!fm->addr)
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goto err_out_free;
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rc = request_irq(dev->irq, tifm_7xx1_isr, SA_SHIRQ, DRIVER_NAME, fm);
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if (rc)
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goto err_out_unmap;
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rc = tifm_add_adapter(fm);
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if (rc)
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goto err_out_irq;
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writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
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writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SETALLSOCK,
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fm->addr + FM_SET_INTERRUPT_ENABLE);
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fm->insert_mask = 0xf;
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return 0;
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err_out_irq:
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free_irq(dev->irq, fm);
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err_out_unmap:
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iounmap(fm->addr);
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err_out_free:
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pci_set_drvdata(dev, NULL);
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tifm_free_adapter(fm);
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err_out_int:
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pci_intx(dev, 0);
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pci_release_regions(dev);
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err_out:
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if (!pci_dev_busy)
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pci_disable_device(dev);
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return rc;
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}
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static void tifm_7xx1_remove(struct pci_dev *dev)
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{
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struct tifm_adapter *fm = pci_get_drvdata(dev);
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unsigned long flags;
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spin_lock_irqsave(&fm->lock, flags);
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fm->inhibit_new_cards = 1;
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fm->remove_mask = 0xf;
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fm->insert_mask = 0;
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writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
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spin_unlock_irqrestore(&fm->lock, flags);
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flush_workqueue(fm->wq);
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tifm_7xx1_remove_media(&fm->media_remover);
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writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
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free_irq(dev->irq, fm);
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tifm_remove_adapter(fm);
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pci_set_drvdata(dev, NULL);
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iounmap(fm->addr);
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pci_intx(dev, 0);
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pci_release_regions(dev);
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pci_disable_device(dev);
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tifm_free_adapter(fm);
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}
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static struct pci_device_id tifm_7xx1_pci_tbl [] = {
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{ PCI_VENDOR_ID_TI, 0x8033, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
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0 }, /* xx21 - the one I have */
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{ PCI_VENDOR_ID_TI, 0x803B, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
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0 }, /* xx12 - should be also supported */
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{ }
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};
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static struct pci_driver tifm_7xx1_driver = {
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.name = DRIVER_NAME,
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.id_table = tifm_7xx1_pci_tbl,
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.probe = tifm_7xx1_probe,
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.remove = tifm_7xx1_remove,
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.suspend = tifm_7xx1_suspend,
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.resume = tifm_7xx1_resume,
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};
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static int __init tifm_7xx1_init(void)
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{
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return pci_register_driver(&tifm_7xx1_driver);
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}
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static void __exit tifm_7xx1_exit(void)
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{
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pci_unregister_driver(&tifm_7xx1_driver);
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}
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MODULE_AUTHOR("Alex Dubov");
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MODULE_DESCRIPTION("TI FlashMedia host driver");
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MODULE_LICENSE("GPL");
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MODULE_DEVICE_TABLE(pci, tifm_7xx1_pci_tbl);
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MODULE_VERSION(DRIVER_VERSION);
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module_init(tifm_7xx1_init);
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module_exit(tifm_7xx1_exit);
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